Diagram below shows two quadrants, AOC and EOD with centre O.
Sector AOB and sector BOC have the same area.
Calculate the area, in cm2, of the coloured region.
The Town Council plans to build an equilateral triangle platform in the middle of a roundabout. The diameter of circle RST is 24 m and the perpendicular distance from R to the line ST is 18 m. as shown in Diagram below.
Find the perimeter of the platform.
Given diameter = 24 m
hence radius = 12 m
O is the centre of the circle.
Using Pythagoras’ theorem: